编程语言与各种框架(Java,python)

继承父类的实体没有打印出来父级的属性问题

接口返回异常: cannot deserialize from Object value (no delegate- or property-based Creator)

java.lang.IllegalStateException: getInputStream() has already been called for this request在使用HttpServletRequest获取post请求对象的方法如下BufferedReader reader = req.getReader();while (null != (line = reader.readLine())){ data.append(line);}当某些时候, tomcat已经读取

从HttpServletRequest获取POST请求对象的方法如果没有spring的@RequestBody注解, 那么获取post请求的对象该做?@RequestBody 注解获取public void getUser(@RequestBody Object req){}2.利用POST请求, 传参是get请求的方式//例如post接口: getUser?username=user&pwd=123public void getUser(@RequestParam("usern

Java格式化百分比DecimalFormat df = new DecimalFormat("0.00%");String str = df.format(double number);如果小位数比设置的要长,那么会自动四舍五入